JP2014533002A - 強化されたcabac復号を用いた画像復号装置 - Google Patents
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Abstract
Description
(a)前記復号装置は、複数の画素を表す動画像のブロックを表すビットストリームを受信し、
(b)前記復号装置は、コンテキスト適応2値算術符号化により符号化された前記ビットストリームを復号し、
(c)前記復号装置は、少なくとも2つの復号モードを用いて前記ビットストリームを復号し、前記第1のモードは、復号されている現シンタックス要素に基づく確率推定に基づいて前記ビットストリームを復号し、前記第2のモードは、復号されている前記現シンタックス要素に基づく確率推定に基づかないで前記ビットストリームを復号し、
(d)前記復号装置は、前記第1のモードを用いてイントラ予測モードを復号するために、イントラ予測モードのリストを用いるべきかどうかを示すデータを復号し、
(e)前記復号装置は、前記第2のモードを用いて対象ブロックのイントラ予測モードを示すデータを復号する、復号装置であって、
イントラ予測モードの前記リストは、前に決定されたイントラ予測モードに基づいて決定される。
(a)復号装置は、複数の画素を表す動画像のブロックを表す量子化された係数を含んだビットストリームを受信し、
(b)復号装置は、コンテキスト適応2値算術符号化を用いてビットストリームを復号し、
(c)コンテキスト適応2値算術符号化は、少なくとも復号されている現シンタックス要素に空間的および時間的に隣接するシンタックス要素値の少なくとも1つに基づく確率推定に基づいてビットストリームを復号する第1のモードと、第2のモードは、復号されている現シンタックス要素への他のシンタックス要素に基づく確率推定に基づかないでビットストリームを復号する第2のモードを含み、
(d)コンテキスト適応2値算術符号化は、現シンタックス要素がイントラ符号化されている場合に第1のモードを用い、プロバブルモードの第1のセットおよびプロバブルモードの第2のセットから選択して、現シンタックス要素を復号し、プロバブルモードの第1のセットは、プロバブルモードの第2のセットより尤度が高く、
(e)コンテキスト適応2値算術符号化は、現シンタックス要素がイントラ符号化されている場合、かつプロバブルモードの第2のセットの1つのうちから選択する場合に、第2のモードを用いて現シンタックス要素を復号する。
Claims (12)
- 動画像を復号する復号装置であって、
(a)前記復号装置は、複数の画素を表す動画像のブロックを表すビットストリームを受信し;
(b)前記復号装置は、コンテキスト適応2値算術符号化により符号化された前記ビットストリームを復号し;
(c)前記復号装置は、少なくとも2つの復号モードを用いて前記ビットストリームを復号し、前記第1のモードは、復号されている現シンタックス要素に基づく確率推定に基づいて、前記ビットストリームを復号し、前記第2のモードは、復号されている前記現シンタックス要素に基づく確率推定に基づかないで、前記ビットストリームを復号し;
(d)前記復号装置は、前記第1のモードを用いてイントラ予測モードを復号するためにイントラ予測モードのリストを用いるべきかどうかを示すデータを復号し、
(e)前記復号装置は、前記第2のモードを用いて対象ブロックのイントラ予測モードを示すデータを復号する、復号装置であって、イントラ予測モードの前記リストは、前に決定されたイントラ予測モードに基づいて決定されることを特徴とする復号装置。 - 対象ブロックのイントラ予測モードを示す前記データは、前記復号装置が前記イントラ予測モードを復号するために前記リストを用いる場合に復号される、イントラ予測モードの前記リストのインデックスであることを特徴とする請求項1に記載の復号装置。
- 対象ブロックのイントラ予測モードを示す前記データは、前記復号装置が前記イントラ予測モードを復号するために前記リストを用いない場合に復号されることを特徴とする請求項1に記載の復号装置。
- 前記第1のモードは、前記復号することに基づいて前記確率推定をアップデートすることを含むことを特徴とする請求項1に記載の復号装置。
- イントラ予測モードの前記リストは、少なくとも2つのモードを含むことを特徴とする請求項1に記載の復号装置。
- イントラ予測モードの前記リストは、単一のモードを含むことを特徴とする請求項1に記載の復号装置。
- 前記ビットストリームは、イントラ予測モードの前記リストを用いるべきかどうかを示すフラグを含むことを特徴とする請求項1に記載の復号装置。
- 前記ビットストリームは、確からしいモードの前記リストにイントラ予測モードを示すインデックスを含むことを特徴とする請求項1に記載の復号装置。
- イントラ予測モードの前記リストの間で選択することは、さらにシンタックス要素タイプに基づくことを特徴とする請求項1に記載の復号装置。
- イントラ予測モードの前記リストの間で選択することは、さらにスライス・タイプに基づくことを特徴とする請求項1に記載の復号装置。
- イントラ予測モードの前記リストの間で選択することは、さらに量子化パラメータに基づくことを特徴とする請求項1に記載の復号装置。
- イントラ予測モードの前記リストの間で選択することは、さらに、復号されたビットストリームの収集された統計データに基づくことを特徴とする請求項1に記載の復号装置。
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US13/291,015 US9088796B2 (en) | 2011-11-07 | 2011-11-07 | Video decoder with enhanced CABAC decoding |
US13/291,015 | 2011-11-07 | ||
PCT/JP2012/007139 WO2013069273A1 (en) | 2011-11-07 | 2012-11-07 | Video decoder with enhanced cabac decoding |
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JP2014520448A Active JP6158802B2 (ja) | 2011-11-07 | 2012-11-07 | 復号装置および復号方法 |
JP2017112361A Active JP6739770B2 (ja) | 2011-11-07 | 2017-06-07 | 強化されたcabac復号を用いた画像復号装置 |
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US (8) | US9088796B2 (ja) |
EP (4) | EP3301934B1 (ja) |
JP (2) | JP6158802B2 (ja) |
CN (2) | CN103959782B (ja) |
DK (2) | DK2777281T3 (ja) |
ES (2) | ES2805626T3 (ja) |
HR (1) | HRP20201220T1 (ja) |
HU (2) | HUE037562T2 (ja) |
IN (1) | IN2014CN03477A (ja) |
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